Eto.Forms - Incorrect window's location

[ghost]

Hello there, I'm not entirely sure if it's a duplicate of #2336 but basically I tried to center the window with the code below:

this.Location = new Point(((int)Screen.PrimaryScreen.WorkingArea.Width - this.Width) / 2,
                          (int)(Screen.PrimaryScreen.WorkingArea.Height - this.Height) / 2);

But it appears to not do what I actually expected so I tried to check the positions, and I found something a bit weird.

So as you can see in the corner of the screen, it says "0; 31" but it's not right it should actually say "0; 0" since I'm in the top left corner of the screen.

Update: Also want to point out that setting location is also broken, basically trying to set the location to 0; 0 won't set the window to this location and exactly do the above.

Expected Behavior

• the Location.X & Location.Y should be 0

Actual Behavior

• the Location.X or Location.Y (differ from platforms but the behavior is incorrect on each of them) are not 0

Steps to Reproduce the Problem

1. Create an Eto.Forms project
2. Add a LocationChanged event with the code below

   private void OnPosChanged(object sender, EventArgs e)
   {
    this.Title = $"{this.Location.X}; {this.Location.Y}";
   }

3. Notice the problem

Specifications

• Version: 2.7.1 (Just tested with 2.7.2 and the problem is still there)
• Platform(s): WPF, GTK (Can't test on Mac, I don't own one)
• Operating System(s): Windows 11

[Miepee]

Checking this locally, this seems like the Y position is the position for the Client, and not the whole window (i.e it excludes decorations and title bars). On KDE, if I disable the borders of the window, and then maximize it, the 0,0 position is correct. With borders: without borders:

[ghost]

Yes, and that's quite of an issue in my opinion, It would great if this could be changed.